I think it'll be a bunch of things working together. Testing, vaccine(s) and therapeutics. I do however think that all this is going to create some awkward psychological dilemmas for countries which have controlled the virus strictly through stringent measures. Like, surely at some point they are going to HAVE to just throw their hands up and say "Look, everyone, the infection fatality rate is now low enough that we're going to have to treat it like flu" and then it will all feel a bit weird and anticlimactic.
I'm also looking forward to the endless fights and wrangling about vaccines coming up. Families and friends falling out because someone won't be vaccinated, employers trying to mandate it, employees refusing it, people getting cross because someone else is getting the vaccine and they think THEY should be getting it before them, etc. etc. etc.